Adjustable pump support



Dec. 2, 1958 P. NAGLE 2,862,453

ADJUSTABLE PUMP SUPPORT Filed April 1, 1954 2 Sheets-Sheet 1 INVENTOR.

R V Percy [Mag a Dec. 2, 1958 P. l. NAGLE 2,862,453

ADJUSTABLE PUMP SUPPORT Filed April 1, 1954 2 Sheets-Sheet 2 IN V ENTOR.

PE/IVy I Nag Z6,

United States Patent G 2,862,453 ADJUSTABLE PUMP SUPPORT Perry I. Nagle,Chicago Heights, Ill. Application April 1, 1954, Serial No. 420,335 3Claims. (01.103-103) This invention relates to a new and improved pumpmounting and more particularly to an adjustable mounting whereby a pumpmay be centered and accurately aligned with adjacent pump impeller shaftbearings. Rotary pumps are used for moving many corrosive chemicals andalso for handling various liquids carrying highly :abrasive solids insuspension. In order to assure reasonable pump life, it is customary .to.form the casings for such pumps from alloys resistant to corrosion andabrasion. Such alloys are often so hard that machining of the casing,otherthan finishing meeting faces, is impractical or prohibitive in costfrom a commercial standpoint. The pump casings are produced by a castingprocess and further finishing operations are held to the minimum. Rotarypumps of this character, however, operate'atcornparative'ly high speedsand it is important that the impeller and shaft be accurately alignedwith the casing. jSuch shafts .are often relatively long in order tokeepthe. drive motor away from areas subject to corrosion or abrasion.

It is an objectof the present invention to provide a new and improvedadjustable mounting for pumps.

It is a further object to provide an adjustable mounting of thischaracter permitting accurate and positive adjustment of apmnprelativeto the mounting.-

It is an additional object to provide such a mounting especially adaptedfor use with a minimum of machine finishing of the pump to be mounted.

It is another object to provide a mounting of this type serving toadjust the pump casing in a plane and an associated shaft mounting foradjusting the shaft position along an axis at right angles to saidplane.

It is also an object to provide a pump mounting which is simple indesign and operation and is adapted for commercial production and use.

Other and further objects will appear as the description proceeds.

I have shown certain preferred embodiments of my invention in theaccompanying drawing, in which Figure 1 is a side elevation of a pumpand mounting, partly in section taken on line 11 of Figure 2;

Figure 2 is a transverse section taken on line 2-2 of Figure 1, and

Figure 3 is a fragmentary section taken on line 33 of Figure 1.

As shown in the drawings, the apparatus comprises a bearing stand 11having bearing supporting portions 12 and 14. The stand 11 also includesa ring portion 16 which extends vertically at the left end of the standfor the purpose of supporting the pump casing 18. The pump casing 18 hasthe central bearing sleeve 28 extending through the opening 21 in thering member 16. This ring member 16 carries three adjusting screws 22which extend radially through the ring and have their inner ends 23engaging the outer face of the sleeve 26. Locking nuts 24 are providedfor maintaining the screws 22 in adjusted position.

The impeller shaft 26 is provided with a protective sleeve 28 extendingthrough the pump casing sleeve 20. This shaft 26 is shown as threadedinto the pump impeller 30. The pump casing 18 is closed by the plate 32having the flanged intake opening 34. The pump casing 18 is providedwith a plurality of spaced overhanging fingers 35. The plate 32 is heldremovably in position by means of the ring 36 and screws 38, the ring 36being provided with a plurality of radially extending fingers 37, thering 36 being inserted and rotated to bring the fingers 37 behind theoverhanging fingers 35 on the pump casing 18. The packing 40 is providedbetween the plate 32 and casing 18. The particular construction of thepump itself forms no part of the present invention.

The shaft 26 carries a rotating finger 42 and passes through the thrustbearing 44. This bearing is mounted on the bearing supporting portion 12of the bearing stand 11. The bearing lock collars 46 are secured to theshaft 26 so as to hold the inner member of thrust bearing 44 againstlongitudinal movement on the shaft. A radial bearing 48 is provided tothe right of the thrust bearing 44 and is carried by the bearingsupporting portion 14 of the bearing stand 11. The bearing stand isconstructed to provide axial adjustment of the shaft 26 and, consequently, of the impeller 30 relative to the casing 18. The axialadjustment means comprises an adjustable carriage 50 through whichpasses a guide key52, this key fitting in a recess in the outer member54 of the thrust bearing 44. The adjustable carriage 50 may belongitudinally adjusted by means-of the screws 56 and 58 which coactwith adjacent vertical faces of the upstandingbearing supportingportions 12 and 14 of the adjustablecarr'iage 15. The screws 56 and 58are provided with the lock nuts 28 and 62, respectively, to maintain thecarriage in ad-' justed position. p

The casing sleeve 20 isprovided with a gland follower 6'5 which fitsabout the shaftsleeve 28 and is adjustable by means of screws 67 andnuts 69. V This adjustment serves to compress the packing 71' againstthe lantern ring 73. The gland follower 65 is shown as provided with abore 75 for the introduction of grease. The sleeve 20 is further drilledand tapped at 77 for the connection of a pipe through which liquid underpressure may be introduced to provide a liquid seal between the pumpchamber and area surrounding the impeller shaft sleeve 28. It will beunderstood that where corrosive material is being handled or whereabrasive particles are entrained in the liquid being handled, it isimportant to keep the liquid handled from entering the casing sleeve 20and engaging the gland' construction and the impeller shaft 26 and itssleeve 28. The inner face 79 of the portion of the pump casing 18immediately surrounding the end of the shaft sleeve 28 is spaced toprovide a clearance so that the pressure of this liquid may preventpassage of the liquid being pumped.

The pump casing 18, in such constructions, is formed of extremely hardalloys and cannot be efficiently machined. For this reason, it may bedesirable to have cast inserts 81 provided which can be formed ofreadily machinable metal. These inserts are tapped to receive the studs83. These studs 83 pass through enlarged openings 85 formed in the ringportion 16 of the bearing stand 11. The nuts 87 mounted on studs 83 bearagainst washers 89 which are of efficient size to adequately cover theenlarged openings 85 and bear against the face of the ring 16.

In assembling the pump on the stand, the radial screws 22 are loosenedand move out through ring 16 so as to clear the inner shoulder 21 on thepump casing sleeve 20. This sleeve 20 is then moved through the ringfrom left to right, as seen in Figure 1, until the casing bossescarrying inserts 81 bear against the left face of ring 16.

The screws 22 are then moved radially to engage the outer face of sleeve20.

Before this assembling movement, the shaft 26 and impeller 30 and glandfollower 65, together with associated elements, may be assembled inrelation to the casing 18. The bearing lock collar 46 may be placed onthe shaft 26 as it is moved through the bearing 44 and on throughbearing 48. The screws 22 are now adjusted until the assembled parts aresupported in such manner that the axis of the impeller shaft 26 isproperly aligned both with the bearings and with the housing 18 andsleeve 20. Screws 22 are then locked in adjusted position by lock nuts24, and nuts 87 are tightened up on studs 83 to secure the housing inaccurate and permanent relationship to the stand, After this adjustmentis secured, further axial adjustment of the impeller shaft 26 andimpeller 30 may be made by means of the screws 56 and 58 and theadjustable carriage 50. The completion of this adjustment then bringsall the parts into their desired adjusted position, and the glandfollower 65 may be tightened as desired.

It will be apparent that the construction is such that no machining isnecessary of the hard alloy of the pump casing 18 in order to bring theparts into the final position required for efiicient operation of thepump, with the impeller shaft properly aligned and axially adjusted.

While I have shown certain preferred embodiments of my improvedconstruction, these are to be understood to be illustrative only as itis capable of variation to meet differing conditions and requirements,and I contemplate such modifications as come within the spirit and scopeof the appended claims.

I claim:

1. A pump and mounting construction comprising a pump having a casingand an integral sleeve extending from the casing, an impeller in thecasing and an impeller shaft extending through the casing sleeve, abearing stand, said stand having a ring portion extending in spacedrelation about the casing sleeve, and adjusting screws mounted in saidportion, the screws extending radially of the shaft and having theirinner ends engaging the casing sleeve, and axially extending means forsecuring the ring portion and easing together in adjusted position.

4 2, A pump and mounting construction comprising a pump having a casingand an integral sleeve extending from the casing, an impeller in thecasing and an impeller shaft extending through the casing sleeve, abearing stand, said stand having a ring portion extending in spacedrelation about the casing sleeve, and adjusting screws mounted in saidportion, the screws extending radially of the shaft and having theirinner ends engaging the casing sleeve, and means for securing the ringportion and casing together in adjutsed position, said means comprisingthreaded studs extending axially from the casing, the ring portion beingprovided with enlarged openings to receive said studs, and nuts mountedon said studs bearing against the outer face of the ring portion.

3. A pump and mounting construction comprising a pump having a casingand an integral sleeve extending from the casing, an impeller in thecasing and an impeller shaft extending through the casing sleeve, abearing stand, said stand having a ring portion extending in spacedrelation about the casing sleeve, adjusting screws mounted in said ringportion and extending radially inward from said ring and engaging theouter face of the casing sleeve to adjust the location of the casingrelative to the stand in a plane normal to the impeller shaft axis, athrust hearing for the impeller shaft carried by said bearing stand, andmeans for adjusting said bearing and the impeller and shaft in an axialdirection.

References Cited in the file of this patent UNITED STATES PATENTS

